<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!--border边框粗细
cellpadding单元格内边距(单元格据内容的距离)
cellspacing单元格间距
-->
<table border="2"cellpadding="5"cellspacing="5">
    <tr ><!--table row 表示行-->
        <!--colspan跨列-->
        <td conlspan="2" align="center">1-1</td><!--table  data表示列-->

        <td rowspan="2">1-3</td>
    </tr>
    <tr>
        <td>2-1</td>
        <td>2-2</td>

    </tr>
    <table border="1">
        <tr>
            <td colspan="2" align="center">1-1</td><td rowspan="2">1-3</td>
        </tr>
        <tr>
            <td rowspan="2">2-1</td><td>2-2</td>
        </tr>
        <tr>
            <td colspan="2">3-2</td>
        </tr>

    </table>
    <table border="2">
    <tr><!-- table header 表头 加粗并居中       -->
        <th>编号</th><th>名称</th><th>单价</th>

        </tr>
        <tr>
            <td>1</td><td>华为p40</td><td>7500</td>
        </tr>
    </table>
</table>

</body>
</html>